/**
 * UGENE - Integrated Bioinformatics Tools.
 * Copyright (C) 2008-2020 UniPro <ugene@unipro.ru>
 * http://ugene.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#ifndef _U2_LOAD_DOCUMENT_TASK_H_
#define _U2_LOAD_DOCUMENT_TASK_H_

#include <QPointer>
#include <QVariantMap>

#include <U2Core/DocumentProviderTask.h>
#include <U2Core/GObjectReference.h>
#include <U2Core/GUrl.h>

namespace U2 {

class Document;
class DocumentFormat;
class IOAdapterFactory;
class StateLock;
class LoadDocumentTask;

// creates object using name and type info from ref
//NOTE: the default impl can create only limited set of objects
class U2CORE_EXPORT LDTObjectFactory : public QObject {
public:
    LDTObjectFactory(QObject *p)
        : QObject(p) {
    }

    virtual GObject *create(const GObjectReference &ref);
};

class U2CORE_EXPORT LoadDocumentTaskConfig {
public:
    LoadDocumentTaskConfig(bool _createDoc = false, const GObjectReference &_ref = GObjectReference(), LDTObjectFactory *_f = NULL)
        : createDoc(_createDoc), checkObjRef(_ref), objFactory(_f) {
    }

    bool createDoc;    // if document is failed to load and 'createDoc' is true -> it will be created
    GObjectReference checkObjRef;    // if is valid task checks that ref is found in doc, fails if not
    LDTObjectFactory *objFactory;    // if not NULL and 'checkObjRef' is not found -> 'objFactory' is used to create obj
};

class U2CORE_EXPORT LoadUnloadedDocumentTask : public DocumentProviderTask {
    Q_OBJECT
public:
    LoadUnloadedDocumentTask(Document *d, const LoadDocumentTaskConfig &config = LoadDocumentTaskConfig());

    virtual void prepare();
    virtual ReportResult report();
    virtual Document *getDocument(bool mainThread = true);

    static QString getResourceName(Document *d);

    const LoadDocumentTaskConfig &getConfig() const {
        return config;
    }

    static LoadUnloadedDocumentTask *findActiveLoadingTask(Document *d);
    static bool addLoadingSubtask(Task *t, const LoadDocumentTaskConfig &config);

private:
    void clearResourceUse();

    LoadDocumentTask *loadTask;
    QPointer<Document> unloadedDoc;
    QString resName;
    LoadDocumentTaskConfig config;
};

class U2CORE_EXPORT LoadDocumentTask : public DocumentProviderTask {
    Q_OBJECT
public:
    static LoadDocumentTask *getDefaultLoadDocTask(const GUrl &url, const QVariantMap &hints = QVariantMap());
    static LoadDocumentTask *getDefaultLoadDocTask(U2OpStatus &os, const GUrl &url, const QVariantMap &hints = QVariantMap());
    static DocumentProviderTask *getCommonLoadDocTask(const GUrl &url);

public:
    LoadDocumentTask(DocumentFormatId format, const GUrl &url, IOAdapterFactory *iof, const QVariantMap &hints = QVariantMap(), const LoadDocumentTaskConfig &config = LoadDocumentTaskConfig());

    LoadDocumentTask(DocumentFormat *format, const GUrl &url, IOAdapterFactory *iof, const QVariantMap &hints = QVariantMap(), const LoadDocumentTaskConfig &config = LoadDocumentTaskConfig());

    virtual void run();
    virtual void prepare();
    virtual ReportResult report();

    const GUrl &getURL() const {
        return url;
    }
    QString getURLString() const;

private:
    void init();
    void processObjRef();
    int calculateMemory() const;

    static void renameObjects(Document *doc, const QStringList &names);

    DocumentFormat *format;
    const GUrl url;
    IOAdapterFactory *iof;
    QVariantMap hints;
    LoadDocumentTaskConfig config;
};

}    // namespace U2

#endif
